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Thin films and devices based on fully compensated half-metallic ferrimagnetic materials

Research Project

Project/Area Number 17H06513
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeSingle-year Grants
Research Field Applied materials
Research InstitutionTohoku University

Principal Investigator

Ouardi Siham  東北大学, 材料科学高等研究所, 助手 (40807591)

Project Period (FY) 2017-08-25 – 2018-03-31
Project Status Completed (Fiscal Year 2017)
Budget Amount *help
¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
KeywordsSpintronics / Heusler alloys / ferrimagnets / spintronics / Half-metals / スピンエレクトロニクス
Outline of Final Research Achievements

One goal in this research project was to grow and extensively investigate the thin films of the new class of material: fully compensated half-metallic ferrimagnets Mn1.5FeV0.5Al. Final goal is to create novel magnetic tunnel junctions with this new material for advanced spintronic applications. We succeeded, for the first time, to grow epitaxial single-crystalline Mn1.5FeV0.5Al thin films with highly L21-ordered Heusler structure prepared using an ultrahigh vacuum magnetron sputtering system. The film exhibited a Neel P-type ferrimagnetic character in AHE, where the magnetic moment of the antiparallel aligned sublattices is always larger in one direction than in the opposite one and no compensation points were obtained. A negative anisotropic magnetoresistance (AMR) ratio was observed. This negative sign of AMR proved the half-metallicity of the films. The result demonstrated that the material films were very promising for advanced spintrnoic applications.

Report

(2 results)
  • 2017 Annual Research Report   Final Research Report ( PDF )
  • Research Products

    (3 results)

All 2018 Other

All Presentation (2 results) (of which Int'l Joint Research: 2 results) Remarks (1 results)

  • [Presentation] Epitaxial growth of compensated ferrimagnetic Heusler thin films Mn-Fe-V-Al2018

    • Author(s)
      Siham Ouardi, Kazuya Z. Suzuki, and Shigemi Mizukami
    • Organizer
      Joint spring meeting of German Physical Society DPG and the European Physical Society EPS Condensed Matter Divisions
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Fully spin-polarized alloys with zero magnetic moments2018

    • Author(s)
      Siham Ouardi, Kazuya Z. Suzuki, and Shigemi Mizukami
    • Organizer
      Kick-off Symposium for World Leading Research Centers - Materials Science and Spintronics
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Remarks] Mizukami Lab.

    • URL

      https://www.wpi-aimr.tohoku.ac.jp//mizukami_lab/

    • Related Report
      2017 Annual Research Report

URL: 

Published: 2017-08-25   Modified: 2019-03-29  

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